1-(p-Methoxybenzyl)-2-(p-methoxyphenyl)-benzimidazole or 1-(p-hydroxybenzyl)-2-(p-hydroxyphenyl)-benzimidazole was synthesized by the condensation of o-phenylenediamine with p-methoxybenzaldehyde or p-hydroxybenzaldehyde, and characterized byelemental analysis, IR and NMR spectra. Single crystals of 1-(p-methoxybenzyl)-2-(p-methoxyphenyl)benzimidazole were obtained. The crystal belongsto orthorhombic system, space group Pna2(1) with cell parameters: a=2.0194(7) nm, b=1.5657(4) nm, c=0.5498(1) nm, α=90°, β=90°, γ=90°, V=1.7383(8) nm³, Z=4, M_r=344.40, D_c=1.316 g/cm³, μ=0.85 cm^－1, F(000)=728.

Key words: benzimidazole, synthesis, crystal structure